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New in Next Release

This page summarizes all major changes and improvements to Cloudy that will be included in the next release. You may also view the HotFixes and KnownProblems pages, or return to the main RevisionHistory page.

Caveats

The code has been ported to C++11. This implies that you need a compiler with full support for C++11. For g++ that means version 4.8.1 or later, for LLVM/clang++ version 3.3 or later, for the Intel compiler version 15.0 or later, and for the Oracle Studio compiler version 12.5 or later.

Parser and related changes

In c17.01 using comment characters other than '#' and '##' was deprecated. These have now been removed.

The implementation of the search path for finding input files has been finalized. This implies that the code now uses a consistent policy for finding files that it needs to read. All commands will now look in the local directory first, and then in the data directory. The user can alter the search path by defining the environment variable CLOUDY_DATA_PATH before the code is started up. See the new sections "Reading and Writing Files" and "The Search Path for Input Files" in Hazy 1 for a more detailed explanation.

Setting the search path in the file path.h was deprecated. This file has now been removed.

Setting the search path as a command line parameter during compilation was deprecated. This option has now been removed.

New commands or options

The atomic and molecular database

The molecular hydrogen level energies, which we use to derive line wavelengths, have been updated
to Komasa (2011).
This results in ~1 wavenumber changes in level energies.

We now use the Lique 2015 H - H2 collisional data by default.
Compared with previous calculations, these data extend to higher vibrational manifolds and include
ortho-para changing reactive collisions.
Tests show that the 2.121 micron line intensity changes by roughly 50%, becoming stronger
in some PDR sims.

Fe III collision strengths are updated to Badnell and Balance 2014.
We had previously used data from Zhang 1996.
Tests show that the total Fe III cooling increases by nearly 50%.